Hose clamp



J. P. EASTMAN May 23,1933 HOSE W v Re. 18,840

2 sheet -sheet 1 Original Filed Dec. 12, 192"! lii/ y. l

x li l May 23, 1933.

J. P. EASTMAN HOISE CLAMP 2 Sheets-Sheet 2 Original iled Dem- 1927illustrated in Figures 1 and 2, it will be seen threads 2, of a certainpitch and direction,

Reissued May 23, 1933 J'OSEPH PETER EASTMAN, 0F MANITOWOO, WISCONSIN 3.0SE CLAMP Original No. 1,808,101, dated June 2, 1931, Serial No. 239,459,filed December 12, 1927. Application for reissue filed August 9, 1932.Serial No. 628,212.

This invention relates to hose clamps. Objects of this invention are toprovide a novel form of hose clamp which is securely attached to thehose and prevents withdrawal 5 thereof, which provides for the easyinsertion of the hose, and which forces the end of the hose tightlyagainst the Wall of the clamp.

Further objects are to provide a hose clamp which is cheap to produce,which is easily and simply attached, and which has a neat and finishedappearance.

Embodiments of the invention are shown in the accompanying drawings inwhich:

Figure 1 is a sectional view of oneform of the device showing it as itappears attached to the hose;

Figure 2 is a view partly in section of the hose clamp shown in Figure 1before it is at- 0 tached to the hose;

Figures 3, 4, 5, and 6, are views corresponding to Figure 2 showingfurther forms of the invention. I

The hose clamp forming the subject mat- 5 ter of this invention isparticularly adapted for cooperation with a hard hose or the like, suchas a metal core hose, for instance.

Referring first to the form of the invention that the hose clamp isformed of a body portion .1 which is provided with two distinct bores,theinner bore being smaller than the outerbore. The inner bore isprovided with and the outer bore is provided with threads 3 of adiflerent pitch and direction. In the form shown in Figures 1 and 2,'thethreads 2 and 3 are formed reversely; for instance,

40 the thread 2 may be a right hand thread, and

the thread 3 may be aleft hand thread. It it to be noted that byformingthe outer bore considerably larger than the inner bore that a thinportion of the stock is left, as indicated by the reference character1'.

, Further, it is to be noted that the bore 2' ends at an abrupt wall orface 4 formed in the body portion. Preferably, the body portion isprovided with an hexagonal or other shaped polygonal face 5, and ifdesired a 4, as shown in Figure 1. Thereafter, the

thinned portion 1 is contracted upon the hose, as shown in Figure 1, andthe threads 3 thereof bite into the hose. Thus, the hose is securelythreaded to the member 1 b means of right and left hand threads, anconsequently the hose cannot be unscrewed.

It is to be distinctly understood that it is within the province of thisinvention to form both bores of the same diameter; that is to say,larger than the diameter of the hose and thereafter to contract theentire ferrule of the body portion. Preferably, however, theconstruction illustrated in the drawings is employed, asthis permits theready insertion of the hose and necessitates contraction of only thethinned portion of the body of the coupling.

It is to be noted particularly that the threads 2 and 3 are formed witha flat forward face and a tapered rear face so that in cross sectionsthey are saw tooth shaped. This insures a very secure bite or grip uponthe hose.

It is apparent that the threads in the'small that the hose cannot beunscrewed as the threades are of different pitch.

In the form shown in Figure 4, the small bore is provided'with threads 9of a certain pitch and direction, whereas the lar e bore is providedwith rings shaped 11 e the threads but extending as distinct circlesaround the interior of the thinned portion.

In the form shown in' igure 5, the small ing adapted to engageprojections, rmgs,

bore is provided with threads 11 and the thinned portion is providedwith axially extending projecting ribs 12 which engage or bite into thehose when the device is contracted and thus prevent rotation thereof.

Referring to Figure 6, it will be seen that the small bore is providedwith threads 13 whereas the large bore in the thinned portion isprovided with projections 14.. These projections may be formedbyindentations 15 forced into the outer side of the thinned portion 1' orthey may be otherwise formed, as desired.

In all forms of the invention, it is apparent that the hose can bereadily screwed into place and that in so doing, the end of the hosewill be forced tightly into abutting engagement with the front wall ofthe clamp. After this, it is a simple matter to contract the thinnedportion and thus cause intimate binding or engagement between thethreads or other members formed in the thinned portion and the hose. Thehose cannot, therefore, be unscrewed or pulled free of the device.

It will be noted further that the device is very simple in construction,may be easily produced, and readily attached to the hose, and that itforms a finished appearance.

Although the invention has been described in considerable detail, suchdescription is intended as illustrative rather than. limiting as theinvention may be variously embodied and as the scope of such inventionis to be determined as claimed.

I claim:

1. A hose clamp comprising a sleeve having a portion internally threadedwith a right hand thread, andanother portion internally threaded with aleft hand thread, both of such portions being adapted to engage aroundthe hose, and one of said portions being thinner than the remainingportion of the sleeve 1110 provide for ready contraction on to the ose.

2. A hose clamp including a body having an annular wall, a sleeveprojecting beyond said wall and having a portion thereof internallythreaded with a right hand thread and another portion internallythreaded with a left hand thread, both of said portions bearound thehose.

3. A clamp having two co-axial portions of different internal diameters,the larger of said portions being adapted tocbe permanently contractedupon a hose after the insertion of the hose into both such portions,both of said portions having internal inwardly projecting hose engagingmeans, the means in one portion being'of a different character from themeans in the other portion;

4. A hose clamp comprising an end wall and a sleeve projecting therefromadapted to receive the end of a hose, said sleeve comprising an inwardportion and an outward portion, both such portions being bored with oresof substantially uniform diameter throughout the respective lengths ofsuch portions, the bore of said outward portion being substantiallygreater than that of said inward portion at the time of insertion of thehose, said outward portion being adapted to be permanently contracted onto the hose, its bore, after such contraction, being reduced tosubstantially the same diameter as that of said first portion.

5. A hose clamp comprising a sleeve adapted to receive the end of a hoseand to be contracted to grip the same, said sleeve having, beforecontraction, an inward portion 0 lesser, parallel bore and an outwardportion of larger bore, the amount of the reduction in diameter'aftercontraction being substantially greater in said in said inward portion.

6. A hose clamp comprising a sleeve adapted to receive the end of a hoseand to be contracted to grip the same, said sleeve, before contraction,being substantially parallel externally throughout its len h, and havingan inward portion of lesser ore" and an outward portion of larger bore,and, after contraction, said sleeve being more contracted at saidoutward portion, no longer substantially parallel externally throughoutits length.

7 A hose clamp comprising a sleeve adapt ed to receive the end of a hoseand to be contracted to grip the same, said sleeve having an inwardportion with a thicker wall and an outward portion with a thinner wall,said two portions being of substantially equal external diameter beforecontraction, and of substantially equal internal diameter aftercontraction.

8. A hose clamp comprising a sleeve adapted to receive the end of a hoseand to gripthe same, said sleeve having, before contraction, an inwardportion of lesser, parallel bore, and an outward portion of larger bore,such outward portion being adapted to admit the hose freely, beforecontraction, but gripping the hose after contraction, due to substantialreduction in diameter of duringcontraction.

In testimony whereof, I aflix my signature.

JOSEPH PETER EASTMAN.

whereby it is said outward portion 1

